Poulan Pro 404378, Operator'S Manual

20

SERVICE AND ADJUSTMENTS

02966

A

A

02548

B

B

PRECISION SIDE-TO-SIDE ADJUSTMENT  

(See Fig. 23)
•     With all tires properly infl ated, park tractor on level 

ground or driveway.

CAUTION: Blades are sharp. Protect 
your hands with gloves and/or wrap 
blade with heavy cloth.

•      Raise mower to its highest position.
•     At both sides of mower, position blade at side and 

measure the distance (A) from bottom edge of blade 
to the ground. The distance should be the same on 
both sides.

•      If adjustment is necessary, see steps in Visual Adjust-

ment instructions above.

•      Recheck measurements, adjust if necessary until both 

sides are equal.

02948

A

Turn nut left
to lower mower

Turn nut right
to raise mower

FRONT-TO-BACK ADJUSTMENT (See Figs. 24 and 25)

IMPORTANT:

  Deck must be level side-to-side.

To obtain the best cutting re sults, the mower blades should 
be adjusted so the front tip is 1/8" to 1/2" lower than the 
rear tip when the mower is in its highest position.

CAUTION:

 Blades are sharp. Protect your 

hands with gloves and/or wrap blade with 
heavy cloth.

•      Raise mower to highest position.
•         Position any blade so the tip is pointing straight forward. 

Measure distance (B) to the ground at front and rear 
tip of the blade.

•      If front tip of blade is not 1/8" to 1/2" lower than the rear 

tip, go to the front of tractor.

•     With an 11/16" or adjustable wrench, loosen jam nut 

A several turns to clear adjustment nut B.

•      With a 3/4" or adjustable wrench, turn front link adjust-

ment nut (B) clockwise (tighten) to raise the front of 
mower, or, counterclockwise (loosen) to lower the front 
mower.

FIG. 22

FIG. 23

FIG. 24

TO LEVEL MOWER

Make sure tires are properly infl ated to the PSI shown on 
tires.   If tires are over or under infl ated, it may affect the 
appearance of your lawn and lead you to think the mower 
is not adjusted properly.

VISUAL SIDE-TO-SIDE ADJUSTMENT (See Fig. 22)
•      With all tires properly infl ated and if your lawn appears 

unevenly cut, determine which side of mower is cutting 
lower.

NOTE:

 As desired, you can raise the low side of mower or 

lower the high side.
•      Go to side of mower you wish to adjust.
•     With a 3/4" or adjustable wrench, turn lift link adjust-

ment nut (A) to the left to lower the mower, or, to the 
right to raise the mower.

NOTE

: Each full turn of adjustment nut will change mower 

height about 3/16".
•         Test your adjustment by mowing some uncut grass and 

visually checking the appearance. Readjust, if neces-
sary, until you are satisfi ed with the results.

B

02950

Tighten adjust nut

B

 to raise mower

Loosen adjust nut

B

 to lower mower

Loosen jam nut 

A

 fi rst

A

FIG. 25